An embodiment is directed to a touch screen panel including first sensing electrodes, second sensing electrodes, and a pad unit to be electrically connected to the first sensing electrodes and the second sensing electrodes, the touch screen panel including first trace lines connecting the first sensing electrodes and the pad unit, second trace lines connecting the second sensing electrodes and the pad unit, and a ground line connected to a ground power supply, the ground line being between the first trace lines and the second trace lines.